Polish-rod grip.



Patented Apr. 9, l90l. W-. J. BEIGHEY.

POLISH BOD GR Application filed Sept. 21,1900.)

mares ATENT Fries.

POLISH-ROD GRIP.

SPECIFICATION forming part of Letters Patent No. 671,749, dated April 9, 1901.

Application filed $eptember 21, 1900. Serial No. 30,715. (No model.)

To (tZZ whom it may concern:

Be it known that 1, WILLIAM J. BEIGHEY, a citizen of the United States of America, residing at Whitestown, in the county of Butler and State of Pennsylvania, haveinvented certain new and useful Improvementsin Polish-Rod Grips, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in polish-rod grips, and is particularly adapted to be used upon a polish-rod connected to the walking-beam of an oil-Well.

The invention has for one object the provision of novel means whereby a polish-rod may be easily attached to the pitman-rod and readily uncoupled therefrom when desired.

Another object of my invention is to construct a grip of this character that will effectually and firmly clasp the polish-rod without marring the surface of the same.

With the above and other objects in View the invention consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claims.

In describing the invention in detail reference is had to the accoinpanying drawings, forming a part of this specification, and wherein like numerals of reference indicate corresponding parts throughout the several views, in which Figure 1 is a side elevation of a polish-rod having applied thereto my improved grip. Fig. 2 is an enlarged vertical sectional view of the grip. Fig. 3 is a perspective view of the frame. Fig. 4 is an enlarged perspective view of the follower.

To clearly illustrate my invention, I have shown a part of an ordinary walking-beam the end 2 of which is bifurated to receive the pitman-rod 3. This pitman-rod 3 is suitably connected at its upper end to the walkingbeam and at its lower end is connected to the polish-rod 5 by means of my improved grip or coupling. This grip comprises a substantially rectangular block or frame 4, which is mounted to move transversely within a sleeve 4, that receives the polish-rod 3, and to which sleeve the pitman-rod is suitably connected. The rectangular block or frame is provided with an opening or slot extending entirely through the same and terminating at one end in a semicircular recess 5 to receive the polish-rod 3 This slot or opening terminates at its other end in a keyway 7,

which is near the opposite end of the block from the simicircular recess 5. On its upper face the block or frame is provided with a recess 6, at each side of the central longitudinal slot or opening, forming shoulders 8 9 on said block or frame. Fitted to slide within the central longitudinal opening in the block or frame 4 is a follower-block 10, having projecting side flanges 11 to lie in the recesses 6 and support the followenblock. The downwardly-extending part 12 of this follower-block slides within the central longitudinal slot or opening in the block or frame 4, and the part 14 of the block 10 that projects beyond the flanges 11 has a concave face 15 to engage with the polish-rod 3 The follower-block 10 is moved within the central longitudinal opening or slot of the block or frame 4 by means of a wedge-key 18, the edge 18 of which is on a vertical line and engages the rear end or wall of the follower'block 10. The opposite edge 18 of this wedge-key is at an angle to a vertical line and engages with the correspondingly-inchned Wall of the keyway 7.

It will be observed that as the key-wedge 18 is driven in the keyway the follower-block 10 will be moved within the central longitudinal opening in the block or frame, so as to force the concave face 15 of the followerblock into engagement with the polish-rod and draw the concave wall of the'recess 5 into engagement with said rod on its opposite side, firmly gripping and holding the rod. When the parts have thus been tightened,the wedgekey 18 may be secured against accidental displacement or loosening by means of aset-screw 16, operating through the side of the block or frame t into the keyway '7 to impinge upon the wedge-key.

I desire to call particular attention to the fact that with this construction of grip no threads are employed for tightening the parts on the polish-rod, as I have found in pracnice that devices of this nature employing threads to tighten the parts are very liable to break and lose the grip, owing to the strain upon the threads often stripping the latter, and thus rendering the device useless.

It will be noted that various changes may be made in the details of construction Without departing from the general spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination with the polish-rod,and a sleeve fitted on said rod and provided with a transverse slot, of a substantially rectangular block fitted Within the transverse slot of said sleeve, said block having a central longitudinal opening or slot terminating at one end in a semicircular recess to receive the polish-rod and at the other end in a keyway, a follower-block fitted to slide in the central longitudinal opening or slot in the rectangular block and, provided on its forward end with a concave face to engage the polish-rod, and a wedge-key in said keyway to force the concave face of the follower-block into engagement with one side of the polish-rod and draw the concave Wall of the semicircular recess into engagement with the opposite side of said polish-rod, substantially as described.

2. In a device of the character described,

of the block or frame in a semicircular recess to receive the polish-rod and near the opposite end of said block or frame in a keyway, a follower-block fitted to the slide in said longitudinal opening or slotin the block or frame, said follower-block having a concave face on its forward end, flanges carried by said follower-block to engage in recesses provided therefor in the block or frame to support the follower-block, a Wedge-key for engagement in the keyway to force the concave face of the follower-block into engagement with the polish-rod and draw the concave wall of the semicircular recess into engagement with the opposite side of said rod, and means carried by the block or frame for securing said wedgekey in position, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

WILLIAM J. BEIGHEY.

Witnesses:

JOHN NOLAND, H. O. EVERT. 

